Renewable knife-blade and cartridge type fuse



F. L. YOUNG Aug. 20, 1929.

RENEWABLE KNIFE BLADE AND CARTRIDGE TYPE FUSE Filed April l0, 1928 nuyATToRugY w mm. MWA/.

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FRANK L. YOUNG, 0F SLN ANTONIO, TEXAS.

BENEWABLE XNIFEFBLADE AND CARTRIDGE TYPE FUSE.

Application led April! 10,

This invention relates to renewable knife blade and cartridge fuses.

An object of the invention is the provision of a fuse having a removablefusible element which may be replaced when neces sary and in which theends of the fusible element are clamped between a movable partition anda closure ca A further object of the invention is the provision of afuse having a movable partition located at each end and a passagethrough which is adapted to be inserted, the free end of a fusibleelement with the free end bent in close Contact with the outer face of apartition and clamped thereto by a closure, the partition being eitherpivoted or removablyr mounted in an end of the fuse l and maintainedagainst rotation b T oppositely dis osed lugs projecting laterally fromthe peripiery of the partition and received within sockets in a brassferrule mounted upon a body formed of insulating material.

This invention will be best understood from a consideration of thefollowing detailed description, in` connection with the accompanyingdrawings; nevertheless, it is to be understood that the invention is notconfined to the disclosure bein susceptibleof such changes andmodificationsas shall define no material departure from the salientvfeatures of the invention as expressed in the appended claims.

' In the drawings Figure 1 is a vertical section showing my inventionapplied to one form of fuse.

Figure v 2 is a horizontal section `taken along the line 2-2 of Fig. 1,

Figure 3 is a vertical section of a slightly modified form of theinvention shown in Fig: 1, v igure 4 is a horizontal section taken alongthe line 4-4 of Fig. 3,

Figure 5 is a vertical'section of the form similar to that shown in Fig.1 applied to the cartridge fuse,

Figure 6 is a vertical seetion'of the form similar to the knife bladefuse shown in Figure 7 is a fragmentary vertical section `of one end ofa cartridge fuse showing a further modified form of the invention,

Figure 8 is a fragmentary vertical section of a further modified formpofa knife blade fuse Figure 9 is a horizontal section taken along l theline 9-9 of Fig. `8,

lon the pintle 2 1928. Serial No. 268,986.

Figure 10 is a fragmentary vertical section of a further modified formof the knife blade fuse shown in Figs. l and 3,

Figure 11 is a horizontal section take along the line 11-11 of Fig. 10,

Figure 12 is a view in erspective of a fusible element, one form of) thefusible element employed inconnection with the fuse, Figure 13 is amodified form of the fusible element shown in Fig. 12. Referring moreparticularly to the drawings, 20 designates a hollow body formed ofinsulating material to which is secured at the opposite ends thereofmetal ferrules 2l upon which are threaded caps 22. The outer end 23 of aferrule forms a seat for a partition 24. i This partition is providedwith laterally projecting pintles or lugs 25, which are received withinsockets 26 formed in the opposite side walls of the metal ferrule 2l.One portion ofthe partition, as shown at 27, is cut away to provide apassage. The portion'A of the partition, as shown at'28, and adjacentthecut away portion 27, isvreduced in size so that it will move withinthe ferrule 21. The remaining portion, as shown at 29, is of sufficientarea to rest upon the upper edge of the ferrule 21.v

struction land the 5 t e reduced portion of the partition may be movedinto thefe'rruIe when it is desired to apply a new fusible element .tothe fuse. The fusible'element 30 has its lop osite ends 31 bent atanangle to the body of the element and located through the partition 24,and a closure disk knife blade section 32. When the ca 22 is screweddown upon the ferrule 21, t e end 31 of the fusible element 30 will beclamped between' the partition and the disk 32.

By this conlpivoting of the partition The disk 32 is formed integrallywith a l knife blade 33, the blade projects outwardly therefrom, and isadapted to be engaged in the usual manner by a pair of spaced contacts;From the inner faee lof the partition 32 projects lugs 34 adapted to bereceived within sockets 35 formed in the ferrule 21, in order to preventrotation of the disk 32. The outer end of the cap 22 is rov'ided with 'aflange 36, which engages t e outer face of the disk 32 adjacent theperiphery thereof for clamping the disk 32 onto the free end 31 of thefusible element 30.

In a plying4 the fusible element 30" to the fuse, tgz caps 22 areremoved and likewise the disk 32 or knife blade section, the free I ends31 of the fusible element are then inserted throughthe passages 27 inthe partition 24 and bent into flat contact with the outer face of thepartition. The disk 32 or knife blade section is then applied and thecap 22 is screwed into position whereby the free ends of the fusibleelement are clamped rigidly together. The construction shown in Fig. 3is identical with the construction shown in Figs.V 1 and 2 except thatwhere the partition is cut away in Figs. 1 and 2, the

` partition 24 in Fig. 3 is provided with a slot 40 through which isinserted the fusible element 30. The other elements of the fuse aredesignated with similare-.reference numerals found in Figs.A 1 and 2.

Referring to the modied form shown in Fig. 5, it will be seen that thebody member 45 is formed of nonconducting material and has mounted atthe opposite ends and con-V nected thereto, brass ferrules 46. Theferrule has a reduced portion, as shown at 47, which is threaded VtoAreceive the internal -threads of a cap shaped contact member 48. Theinternal portion of the ferrul'e is provided with a shoulder 49 uponwhich is adapted to be'seated a partition 50 pivoted at 51 to theferrule 46, as shown in Figs. 1 to 4 inclusive. i

The partition is provided with'a cut out portion 52 through which isinserted an end ofthe fusibleeleinent 53 with the en d 54 clampedbetween the inner face of the cap 48 and the outer face of the partition50.

The portion of the partition 50 adjacent thev cut away portion 52 isreduced in area so that said portion may be moved inwardly of theferrule when the partition is swung upon its pivots 51. i

The modified form shown in Fi 6 is similar in all respects except thatit is provided with a slot instead of a cut away ortion through which isinserted an end o a fusible element 53.

In the construction shown in Figs. 8 and 9, the partition is removablefrom the ferrule 66, since it merely has the portion adjacent theeripherylfli'esting upon a shoulder 67 of the errule. e partition isprovided with a slot 68 through which is inserted an endof the fusibleelement. 69. Said end 70 is clamped between the partition 65 and ay ofthe fusible element 85 which is clamped as shown at 86 between a disk 87of a knife blade section andthe partition 80. The lugs 81 and thesockets 82 provide for a pivotal mounting of the partition 80, whilepermitting removal of the partition from an end of the body member 88. i

In the construction shown in Fig. 7, the. lugs 90 are disclosedprojecting laterally from the partition 91 which are received withinsimilar sockets formed in the ferrule 92 so that the partition isremovable from the ferrule while having pivotal qualities.

Referring to Fig. 12, a fusible element 93 is shown provided with cutout portions 94 for reducing the element at this point.

The fusible element 95 shown in Fig. 13 is provided with a reducedportion 96 which may be readily fused when too great a current is passedVAthrough the same.

It should be noted that various methods may be employed for securing thebrass ferrules in all of the different devices of the insulatingmaterial and the hollow body, since these various forms of securingmeans Vmay be applied to any of the construction.

Similar reference numerals are being employed to indicate all likeforms. The brassl ferrules may be pressed or screwed internally orexternally. on the body members and secured against rotation by means ofrivets 100. Instead of rivets the metal of the fer` rule may be cut orpunched to form prongs 101 which are forced into the material of thebody. In all of the closure elements passages 102 are provided to permitthe escape of gas and air when a fuse is burned. Each' partition isprovided with a notch or a plurality of notches 103 which are. adaptedto be engaged by a suitable tool whereby one end of the partition may beraised. Furthermore the outer end of the ferrules may be grooved or notin alignment with the notches in the partitions for facilitating theinsertion of the tool.

I claim 1. A fuse comprising a hollow body formed of insulatingmaterial, a metal ferrule secured to an end of the body and providedwith a seat at the outer end, a disk pivoted to the fer-rule atdiametically opposite points, and normally supported by the seat, saiddisk provided with a passage, a fusible link having an end insertedthrough the rpassage and bent into fiat contact with the outer face ofthe disk, and means removably connected to the ferrule for clamping thebent end of the link to the disk.

2. A fuse comprising a hollow body formed of insulating material, ametal 4fermuseo rule secured to an end of the body and provided with aseat at the outer end, and a pair of oppositely disposed sockets, a diskhaving laterally projecting lugs received by the sockets and normallysupported bythe seat for pivotally mounting the disk, said disk providedwith a passage, a fusible link having an end inserted through thepassage and bent into flat contact with the outer face of the disk, andmeans removably connected to the ferrule for clamping the bent end ofthe link to the disk.

3. A fuse comprising a hollow body formed of insulating material, ametal ferpivoted to the ferrule, and normally sup` bent into fiatcontact with the outer rule secured to an end of the body and providedwith a seat at the outer end and a pair of oppositely disposed sockets,a disk having laterally projecting lugs received by the sockets andnormally supported by the s eat for pivotally mounting tne disk, saiddisk rovided with a passage, a fusible link havmg an end insertedthrough the passa e and ace of the ddisk, and means removably connectedlto the ferrule for clamping the bent end of the link to the disk, saiddisk being movable from the seat.

4. A fuse comprising a hollow7 body formed of insulating material, ametal ferrule secured to an end of the body and provided with a seat atthe outer end, a disk ported by the seat, said disk provided with apassage, a fusible link having an end in serted through the passage andbent into flat contact with the outer faee of the disk, and meansremovably connected to the ferrule for clamping the bent end of the linkto the ported by the seat, said disk provided with i a passage, afusible link having an end in-u serted t rough'the passage and bent intofiat contact with the outer fase of the disk, means removably connectedto the ferrule for clam ing the bent end of the link to the disk, saidisk beinfr movable to a position Where it will aline with thelongitudinal axis ofthebody, with a portion of the disk being disposedwithin the ferrule, the portion of the disk which is adapted tobe movedinto the ferrule having the periphery eut away on the are of a curve,the radius of the curve being less than the radius of the periphery ofthe remainingportion of the disk. l Y

FRANK L, YOUNG.

